求动词过去式：结尾直接加ed 结尾直接加d 结尾去y加ied 双写最后一个字母加ed 及不规则变化

pick-picked kick-kicked count-counted paint-painted protect-protected fill-filled call-called
turn-turned play-played look-looked
name-named promise-promised like-liked love-loved live-lived use-used produce-produced
arrive-arrived receive- received hope-hoped
marry-married study-studied carry-carried worry-worried hurry-hurried copy-copied
try-tried cry-cried simplify-simplified
stop-stopped drop-dropped fit-fitted travel-travelled beg-begged rob-robbed
pat-patted drip-dripped plan-planned hug-hugged
eat-ate write-wrote sing-sang ride-rode swim-swam hurt-hurt wear-wore put-put
come-came run-ran